On 9/17/07, Ptit_Bleu <[EMAIL PROTECTED]> wrote: > I have a data frame of 2 columns with the following types : > data$day char > data$value num > > And I plot my data with : > plot(strptime(donnees$day,format="%Y-%m-%d %H:%M:%S"),donnees$value, > type="l") > > And I'd just like to get the numerical value of the integration of this > graph. > I looked at ?integrate but, as far as I understood (that is, not very much, > due to my poor english), it seems that it doesn't work with values in data > frame. > > Could you please help me to do this ?
I admit that others may find better solutions, but a possible solution could be summing the areas of the trapezoids over the sequence of them. It would be easy to program a function to do that, I guess Paul ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
